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      # Our validation errors:
      my $errors = $Session->{validation_errors} || { };
      $::err = sub {
        my $field = shift;
        my $error = $errors->{$field} or return;
        %><span class="field_error"><%= $Server->HTMLEncode( $error ) %></span><%
      };
    %>
    <form id="register_form" method="post" action="/handlers/myapp.register">
      <p>
        <label>Email:</label>
        <input type="text" name="email" value="<%= $Server->HTMLEncode( $Form->{email} ) %>" />
        <% $::err->("email"); %>
      </p>
      <p>
        <label>Password:</label>
        <input type="password" name="password" />
        <% $::err->("password"); %>
      </p>
      <p>
        <label>Confirm Password:</label>
        <input type="password" name="password2" />
        <% $::err->("password2"); %>
      </p>
      <p>
        <input type="submit" value="Register Now" />
      </p>
    </form>
    </asp:Content>

The form submits to the URL `/handlers/app.register` which means `handlers/app/register.pm`

File: `handlers/app/register.pm`

    package app::register;
    

    use strict;
    use warnings 'all';
    use base 'ASP4::FormHandler';
    use vars __PACKAGE__->VARS; # Import $Response, $Form, $Session, etc
    use App::db::user;
    

    sub run {
      my ($self, $context) = @_;
      

    # If there is an error, return the user to the registration page:
    if( my $errors = $self->validate() ) {
      $Session->{validation_errors} = $errors;
      $Session->{__lastArgs} = $Form;
      $Session->save;
      return $Response->Redirect( $ENV{HTTP_REFERER} );
    }
    

    # Create the user:
    my $user = eval {
      App::db::user->do_transaction(sub {
        return App::db::user->create(
          email     => $Form->{email},
          password  => $Form->{password},
        );
      });
    };
    

    if( $@ ) {
      # There was an error:
      $Session->{validation_errors} = {email => "Server error.  Sorry!"};
      $Session->{__lastArgs} = $Form;
      $Session->save;
      return $Response->Redirect( $ENV{HTTP_REFERER} );
    }
    else {
      # No error - Sign them in:
      $Session->{user_id} = $user->id;
      $Session->{msg} = "Thank you for registering!";
      $Session->save;
      

        # Redirect to /profile.asp:
      return $Response->Redirect("/profile.asp");
      }# end if()
    }
    

    sub validate {
      my ($self) = @_;
      

    $self->trim_form;
    

    my $errors = { };
    no warnings 'uninitialized';
    

    # email:
    if( length($Form->{email}) ) {
      # Basic email validation:
      unless( $Form->{email} =~ m{[^@]+@[^@]+\.[^@]+} ) {
        $errors->{email} = "Invalid email address";
      }
    }
    else {
      $errors->{email} = "Required";
    }
    

    # password:
    unless( length($Form->{password} ) {
      $errors->{password} = "Required";
    }
    

    # password2:
    if( length($Form->{password2}) ) {

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      }# end foreach()
    %>
    </div>
    

    <div style="float: right; width: 40%; border: dotted 1px #000;">
      <h3>Send New Message</h3>
      <form id="send_form" method="post" action="/handlers/app.send">
        <p>
          <label>Recipient:</label>
          <select name="to_user_id">
    <%
      my @users = App::db::user->search_where({
        user_id => {'!=' => $user->id }
      }, {
        order_by => "email"
      });
      foreach my $user ( @users ) {
    %>
            <option value="<%= $user->id %>"><%= $Server->HTMLEncode( $user->email ) %></option>
    <%
      }# end foreach()
    %>
          </select>
        </p>
        <p>
          <label>Subject:</label>
          <input type="text" name="subject" maxlength="100" />
        </p>
        <p>
          <label>Message:</label><br/>
          <textarea name="body"></textarea>
        </p>
        <p>
          <input type="submit" value="Send Message" />
        </p>
      </form>
    </div>
    </asp:Content>

The form submits to `/handlers/app.send` which maps to `handlers/app/send.pm`

File: `handlers/app/send.pm`

    package app::send;
    

    use strict;
    use warnings 'all';
    use base 'ASP4::FormHandler';
    use vars __PACKAGE__->VARS;
    use App::db::user;
    use App::db::message;
    

    sub run {
      my ($self, $context) = @_;
      

    # Create the message:
    my $msg = eval {
      App::db::message->do_transaction(sub {
        my $msg = App::db::message->create(
          from_user_id  => $Session->{user_id},
          to_user_id    => $Form->{to_user_id},
          subject       => $Form->{subject},
          body          => $Form->{body},
        );
        

        # Send an email to the recipient:
        $Server->Mail(
          from        => 'root@localhost',
          'reply-to'  => $msg->sender->email,
          to          => $msg->recipient->email,
          subject     => 'New in-club message',
          message     => <<"MSG",
    Dear user,
    

    Another user (@{[ $msg->sender->email ]}) has sent you an in-club message.
    

    Please login and view it on your profile at http://$ENV{HTTP_HOST}/
    

    Yours,
    The "In Club"
    MSG
        );
        

        # Finally:
        return $msg;
      });
    };
    

      if( $@ ) {
        $Session->{msg} = "Error: Your message could not be sent.";
        $Session->save;
        return $Response->Redirect( $ENV{HTTP_REFERER} );
      }
      else {
        $Session->{msg} = "New message sent successfully.";
        $Session->save;
        return $Response->Redirect( $ENV{HTTP_REFERER} );
      }
    }

# BUGS

It's possible that some bugs have found their way into this release.

Use RT [http://rt.cpan.org/NoAuth/Bugs.html?Dist=ASP4](http://rt.cpan.org/NoAuth/Bugs.html?Dist=ASP4) to submit bug reports.

# HOMEPAGE

Please visit the ASP4 homepage at [http://0x31337.org/code/](http://0x31337.org/code/) to see examples
of ASP4 in action.